Congrats! Last spring/summer I tackled the engine side of the boat wiring. It was fun and no where near as complicated as commercial AC and heat units. NOT to mention the voltages are much lower and somewhat safer. 
Back of my engine panel "before"
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"After"
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Panel. still a little scary on the back side but better then it was. Most all the battery cable crimped connectors were "pull off with hand" loose.
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Back of my engine panel "before"
"After"
Panel. still a little scary on the back side but better then it was. Most all the battery cable crimped connectors were "pull off with hand" loose.
